Results 101 to 110 of about 97,485 (296)
Guangtongxin yanjiu, 2023 To simplify the structure of real-time coherent Free-Space Optical (FSO) / wireless systems and reduce costs, this paper implements a low-cost FSO system based on bandpass Delta-Sigma Modulation (DSM) technology. A 256-ary Quadrature Amplitude Modulation
WANG Zhong-zhong, AO Xue-yuan, YANG Qi
doaj
A design methodology to enable sampling PLLs to synthesise fractional-N frequencies [PDF]
, 2011 A novel design methodology is proposed to enable sampling phase-locked loops (SPLL) to synthesise fractional-N frequencies. To date, SPLL can only generate integer-N frequencies.
Condon, Marissa +2 more
core
Video Transmission by Delta-Sigma Modulation
The Journal of the Institute of Television Engineers of Japan, 1963 テレビジョン信号のように直流をふくむ広帯域の信号を符号化伝送することは, 従来PCM, Δ変調を用いて試みられてきた.本報ではΔ変調と同等の簡単な回路でこれよりすぐれた特性が得られるΔ-Σ変調方式を取上げ, この方式によってテレビジョン信号の伝送実験を行なった結果を報告する.実験のため構成した変調装置はトンネルダイオードを基本要素とし, 最高サンプリング周波数60Mc/s, 伝送帯域3.5Mc/sのもので, これによって水平解像度300～350本の再生画像を得た.
Hiroshi Takano +2 more
openaire +2 more sources
Advanced Functional Materials, EarlyView.Circular photogalvanic effect measurements and first‐principles calculations reveal spin‐splitting states in solution‐processed bournonite films (CuPbSbS3) due to structural and bulk inversion asymmetry. The results provide experimental confirmation of coexisting Rashba and Dresselhaus spin‐splitting states in this non‐centrosymmetric chalcogenide ...
Aeron McConnell +5 more
wiley +1 more source
METHODS FOR IMPROVING METROLOGICAL PARAMETERS OF ΣΔ-ADC
Измерение, мониторинг, управление, контрольBackground. ADC / DAC are one of the main elements of modern technical systems and, in general, most digital devices that interact with the environment.
A.G. Dmitrienko +3 more
doaj +1 more source
Components for oversampled signal processors [PDF]
, 2002 Oversampled converters trade transmission bandwidth for resolution. An idealized model gives an insight into the way in which signals are encoded and thus how they can be manipulated.
Monk, John
core
Advanced Functional Materials, EarlyView.An efficient NiOx HTL is successfully prepared by introducing MXene as an additive without further surface modification to fabricate high‐performance FASn0.5Pb0.5I3 perovskite solar cells. The introduction of MXene contributes to improved conductivity of NiOx, better aligned at NiOx/perovskite interfaces, and enhanced quality of perovskite films ...
Lijun Chen +12 more
wiley +1 more source
Testing high resolution SD ADC’s by using the noise transfer function [PDF]
, 2004 A new solution to improve the testability of high resolution SD Analogue to Digital Converters (SD ADC’s) using the quantizer input as test node is described.
De-Venuto, Daniela, Richardson, Andrew
core
Control of Polarization and Polar Helicity in BiFeO3 by Epitaxial Strain and Interfacial Chemistry
Advanced Functional Materials, EarlyView.In BiFeO3 thin films, the interplay of interfacial chemistry, electrostatics, and epitaxial strain is engineered to stabilize homohelicity in polarization textures at the domain scale. The synergistic use of a Bi2O2‐terminated Aurivillius buffer layer and a highly anisotropic compressive epitaxial strain offers new routes to control the polar‐texture ...
Elzbieta Gradauskaite +5 more
wiley +1 more source
Correlator based on delta-sigma modulation
Electronics Letters, 1976 The delta-sigma modulation (d.s.m.) technique has been employed for the realisation of a simple correlator which can be used for limited-bandwidth signals.
openaire +1 more source